hi everyone I have a buddy I work with that has a 50..it wasn't running the way he wanted it to so he had a guy rebuild the carb a year or so ago..at that time the guy said the bowl gasket supplied in the kit wasn't the correct one...something about no bevel on it or something...anyway he uses it on his farm and this year it has started leaking some around the bowl to body area...tractor will run good under a load but sputter around going down a hill or low rpms...he said he can shut the needle all the way off and it still runs...so my questions are 2 if it is leaking at the bowl then its probably drawing air and that's why the needle has little to no effect on it?...and where would a guy get the correct bowl gasket and is there a certain shape or bevel or perhaps non beveled...thanks for any help